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GM exploring ways to raise half-ton Duramax diesel tow rating

Lots of truck owners cheered when GM announced fuel economy numbers for the 2020 Chevrolet Silverado with the 3.0-liter Duramax diesel inline-six. Even after Ram let loose its EPA mileage ratings for the 2020 Ram 1500 EcoDiesel, the Chevy oil-burner still took the trophy. The victory was years in the making, GM engineers spending an entire four-year development cycle refining the LM2 Duramax to increase mileage. The tradeoff, as well all know by now, is towing; the Duramax in half-ton duty pulls a maximum 9,300 pounds in the Silverado. Rivals across town can do more, the Ford F-150 PowerStroke rated at 11,500, the Ram 1500 EcoDiesel game to pull 12,560. GM engineer John Barta told Muscle Cars & Trucks that more hauling chops could be on the way, explaining, "We’re actually looking at upgrading some of the materials around (the engine bay) to see if we can maybe raise our tow rating." Engine bay materials are at issue due to thermal complexities underhood. John Barta, GM's assistant chief engineer of diesel engine controls, said the Duramax's inline-six configuration allowed engineers to get emissions hardware like the combined selective catalytic reduction, diesel oxidation catalysts, and diesel particulate filter unit closer to the engine, where it heats up quicker, getting emissions down quicker. But that filter puts another heat source in those confines, enforcing a cap on the tow rating to keep the engine and other systems from overheating. "If you look under the hood," he said, "youÂ’ll see a significant amount of silver ‘moon tapeÂ’ around to make sure things arenÂ’t getting overheatedÂ… if we were to go up in higher towing, which we can, we start impacting the possibility of deteriorating some of the components.” There isn't much space for more grille, so swapping for a better grade of "moon tape" or a different kind of material could reduce engine bay heat, extracting a higher tow rating in the process.  It's important to note a point Barta's been making for months about the Duramax figures, though. "Even though itÂ’s nice to brag about big numbers, in reality, light duty customers are not towing that large with their trucks," and, "We do know that (95 percent) of our light duty customers donÂ’t tow over 9,000 pounds." On our First Drive of the 2020 Silverado diesel we called out the tow rating, but emphasized that the Chevy and GMC have more important challenges to overcome.

Chevy Corvette gets Valet Mode with Performance Data Recorder [w/video]

For the 2015-model-year, Chevrolet introduces Valet Mode for the Corvette, an enhancement to the Performance Data Recorder (PDR) already available and to your peace of mind. The PDR already captures 720p HD video with a windshield-mounted camera, records interior audio with a cabin microphone and gathers telemetry data using GPS, saving the data to an SD card in the glovebox. You can then watch your track-day antics with various information overlays on the center console screen.
Valet Mode will let you hit 'Replay' when your car gets pulled up front smelling vaguely of fricasseed clutch. Turned on by entering a four-digit code, it also locks the interior storage spaces and turns off the infotainment system. It can't be turned off until the code is re-entered. There's a press release below with more information as well as a video that explains how it works, with the obligatory dig at the 'Vette's biggest foe.

GM will make Chevy Volt production announcement tomorrow

Thing are apparently happening to get the next-generation Chevy Volt ready for public consumption. The most obvious proof is in a preview of an announcement (possibly coming tomorrow) that the two main places where General Motors gets the Volt ready -the Detroit-Hamtramck Assembly Plant and the Brownstown Township battery assembly facility - will be getting big money upgrades and lots of new positions. The Hamtramck plant builds the Volt and its fancier cousin, the Cadillac ELR, as well as the global versions of the Volt. The Detroit News reports that GM will add 1,400 jobs and spend roughly $450 million at the two locations in order to build the redesigned Volt. What's less clear is exactly what the updates will bring us. We've heard that the new volt will be a 2016 model and come on a new chassis. Speculation in The Detroit News about tomorrow's announcement runs the gamut from a new compact PHEV with less electric range and a lower price (which makes sense) to an updated Volt with more electric range (heard it before) to a new all-electric vehicle (the moon shot). If there's any hints to be gleaned in the international Volts, there are also reports coming in that the Opel brand will get an all-electric vehicle that is cheaper than the Ampera. Read into that what you will. We pestered GM's Kevin Kelly on the new Volt (again) and he said (again) that he couldn't give out any more detail other than what's been reported. He just told AutoblogGreen that there will be an announcement tomorrow and that it will be about the Hamtramck and Brownstown facilities and involve the Volt. So, stay tuned.